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jetting for big bore kit

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I have a 05 250x with the ccc mods done per the honda bulletin. I have the following jetting pilot 45, a/s 2 turns, 158 main, 70 starter jet. it runns great hard to start cold but i can deal with that. I am installing a athena 280 kit and need a baseline jetting to start with. Can you help?

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I wish I could help you but I have the same problem with my son's RM125 two-stroke - had to overbore to 134cc and need to know what jetting changes are required.

Let me know if you find a source.

Good luck

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